不同试模对灌浆料早期抗压强度影响试验研究

陈大川 李亮如 彭勃 林悦慈

摘   要：采用统一的原材料、配合比、养护条件制作了3种不同试模、6个不同龄期的216个水泥基灌浆料试块，在相同的加载条件下进行了抗压强度测定，研究了在6个不同龄期下，不同试模对水泥基灌浆料试块早期抗压强度的影响及不同试模下抗压强度换算系数. 得出了第Ⅲ类水泥基灌浆料在标准养护条件下尺寸为40 mm×40 mm×160 mm棱柱体标准试块与尺寸为150 mm×150 mm×150 mm立方体非标准试块的早期抗压强度换算系数和第Ⅳ类水泥基灌浆料在标准养护条件下尺寸为100 mm×100 mm×100 mm立方体标准试块与尺寸为150 mm×150 mm×150 mm立方体非标准试块的早期抗压强度换算系数. 分析各个早期强度换算系数变化规律，得出可供实际工程参考的换算系数.

关键词：灌浆料;早期抗压强度;不同试模;换算系数

中图分类号：TU526                         文献标志码：A

Abstract：In this test， 216 cement-based grouting test blocks with 3 different test models and 6 different ages were made using uniform raw materials， mixing ratios， and curing conditions. The compressive strength was measured under the same loading conditions. The effects of different test models on the early compressive strength of cement-based grout test blocks and the conversion coefficients of compressive strength under different test models were studied at six different ages. The conversion coefficients of early compressive strength of the standard test block with the size of 40 mm×40 mm×160 mm prism and the non-standard test block with the size of 150mm×150mm×150mm under standard curing conditions are obtained， and the conversion coefficients of early compressive strength of the standard test block with the size of 100 mm×100 mm×100 mm cube and the non-standard test block with the size of 150 mm×150 mm×150 mm under the standard curing conditions of the Class IV cement-based grout are obtained. The change rule of each early strength conversion coefficient was analyzed， and the conversion coefficient was obtained which can be used as a reference for practical engineering application.

Key words：grouting material;early compressive strength;different test models;conversion coefficient

国外学者对灌浆料的研究较早，世界上最早的灌浆料起源于1802年的法国，为法国工程师Charles Berling为加固砌筑墙体所创造，距今已有200余年. 随后该技术不断传入其他国家[1].  水泥基灌浆料由高强胶结材料、多种功能外加剂和精选骨料等组成，具有超强黏结、早强、高强、微膨胀、大流动性等优点[2]，多用于混凝土结构加固、补强、修复. 灌浆料的强度除与胶结材料、外加劑等各项因素有关外，与其几何尺寸、几何形状等变化也密切相关. 同时，随着灌浆料在加固工程中的应用日益广泛，为了确保施工进度及安全，工程对灌浆料早期抗压强度的要求也越来越高.

《水泥基灌……